BC for Audiometry

High performance RADIOEAR B-81 Bone Conductor

For audiometry and more accurate hearing diagnostics

RADIOEAR B-81 technical data:

High maximum output, low distortion
Very robust product
Dimensions: H 16 mm, L 31.7 mm, W 18.2 mm
Weight: 20 g
Sensitivity: 118 dB re.1 µN @ 1 Vrms & 1 kHz
Total Harmonic Distortion: 1% @ 1 Vrms & 1 kHz
Impedance: 12.5 ohm @ 1 kHz
Secured plug

NB: Measurements performed on Brüel & Kjær 4930, Artificial Mastoid with static force 5,4N.

For inquiries and supply of BC 81 please contact info@radioear.us.

Scientific Paper

Please retrieve your copy of the SCIENTIFIC PAPER presented at the S2 workshop, 30 October, 2013, Chalmers, Gothenburg, Sweden: A New Audiometric Bone Conductor B81 for more accurate hearing diagnostics.

The objective was to evaluate the electro-acoustic performance of the new audiometric bone vibrator Radioear B81 (Radioear Corporation, New Eagle, PA, USA). Comparison was made with the present Radioear B71 that has some well-known limitations at low frequencies.

Co-authors: Karl Johan Fredén Jansson*, Bo Håkansson*, Leif Johannsen** & Tomas Tengstrand***.
* Department of Signals and Systems, Chalmers University of Technology, Göteborg, Sweden, **Ortofon A/S, Denmark, ***Hörselverksamheten & The Sahlgrenska Academy, Göteborg University, Göteborg, Sweden

More information:

Read our Bone Conductor brochure

Microtech innovation and the culture of excellence
Since 1918, Ortofon has been a world-leader in the field of precision engineering
Bone Conductors - a niche product in the hearing aid market
Ortofon's core competences in acoustics and micromechanics are ideally suited to the manufacture of BC
From customer design to final product
At Ortofon, we always strive to match the high quality of our products with high quality services